HP 3150 EN - Manual (Page 163)

EN Image formation troubleshooting 161
Light character
shadows or
repetitive marks
appear on the
page. A roller is damaged.
The HP LaserJet 3100/3150 product
needs to be cleaned.
If you are using transparencies, they do
not meet HP’s specifications.
The paper’s texture is too coarse.
The toner cartridge is damaged, causing a
repetitive black flaw on every printout.
The toner cartridge’s photosensitive drum
has been overexposed to bright light,
causing repetitive defects (usually a fuzzy
black area).
Use the “Repetitive image defect ruler”
later in this chapter to determine which
roller is damaged. Replace the roller.
See the appropriate sections of Chapter
3, “Maintenance.”
Make sure that the media meets
specifications detailed in HP’s media
specifications guide.
Try changing to a paper with a smoother
finish.
Replace the toner cartridge.
Replace the toner cartridge.
Character voids
appear (white
areas within the
parts of characters
that should be
solid black). The paper or transparencies do not meet
HP’s specifications.
You are printing on the wrong surface of
the paper.
Make sure that the media meets
specifications detailed in HP’s media
specifications guide.
Remove the paper and turn it around.
(The wrapper on many reams of paper
has an arrow indicating the print side.)
Background
scatter appears on
a printed page. Background scatter results from bits of
toner distributed on the front or back of a
printed page. Background scatter often is
isolated to a specific area of the page.
Toner has spilled inside the product.
The pickup roller is dirty.
Try changing the print density setting. If
that doesn’t work, change the paper type,
weight, or surface finish. If background
scatter occurs on an envelope, try moving
the text to an area with no seams. Printing
on seams can cause this problem.
See the appropriate sections of Chapter
3, “Maintenance.”
See the appropriate sections of Chapter
3, “Maintenance.”
Problem Cause Solution